Title :
Effect of Nuclear Elastic Scattering on Ion Heating in Thermonuclear Plasmas
Author :
Matsuura, H. ; Nakao, Y.
Author_Institution :
Dept. of Quantum Phys. & Nucl. Eng., Kyushu Univ., Fukuoka
Abstract :
Distortion in the fuel-ion (deuteron and triton) velocity distribution functions due to nuclear elastic scattering (NES) by beam ion and alpha-particle during neutral-beam-injection (NBI) plasma heating operation is studied by simultaneously solving the Boltzmann-Fokker-Planck (BFP) equations for deuteron, triton, alpha-particle and beam ion in the deuterium-tritium (DT) thermonuclear plasmas. Using the obtained distribution functions, enhancement in the T(d,n)4He fusion reaction rate coefficient between background deuteron and triton are estimated. It is shown that the enhancement in the T(d,n)4He reaction rate coefficient becomes appreciable in low-density operations, i.e. neles5times1019 m-3
Keywords :
Boltzmann equation; Fokker-Planck equation; deuteron-nucleus reactions; fusion reactor fuel; fusion reactor ignition; fusion reactor operation; fusion reactor theory; nuclear fusion; nuclei with mass number 1 to 5; plasma beam injection heating; Boltzmann-Fokker-Planck equations; T(d,n)4He; alpha-particle scattering; beam ion scattering; deuterium-tritium thermonuclear plasmas; deuteron; distortion; fuel-ion velocity distribution functions; fusion reaction rate coefficient; fusion reactor operations; ion heating; neutral-beam-injection plasma heating operation; nuclear elastic scattering effect; triton; Distribution functions; Equations; Heat engines; Heating; Ion beam effects; Ion beams; Particle beams; Particle scattering; Plasmas; Probability distribution; deuterium-tritium (DT) thermonuclear plasma; neutral-beam injection (NBI); nuclaear elastic scattering (NES);
Conference_Titel :
Fusion Engineering 2005, Twenty-First IEEE/NPS Symposium on
Conference_Location :
Knoxville, TN
Print_ISBN :
0-4244-0150-X
Electronic_ISBN :
0-4244-0150-X
DOI :
10.1109/FUSION.2005.252979
